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Ring

Syntax

Ring(R:RING):RING

Summary

returns the ring with a given name

Description

This function returns the ring with identifier R.

example

    
Use R ::= Q[x,y,z];
S ::= Z/(3)[a,b];
Ring(S);
Z/(3)[a,b]
-------------------------------
Ring(R);
Q[x,y,z]
-------------------------------
R;  -- same as above, as long as there is no variable with identifier
    -- R in the working memory
Q[x,y,z]
-------------------------------
CurrentRing();
Q[x,y,z]
-------------------------------
R := 5;  -- a variable with identifier R; now there are two objects
         -- with the identifier R: a variable and a ring
R;
5
-------------------------------
Memory();  -- the variables of the working memory
["It", "R"]
-------------------------------
RingEnvs();  -- the list of rings
["Q", "Qt", "R", "S", "Z"]
-------------------------------
Ring(R);  -- the ring with identifier R
Q[x,y,z]
-------------------------------

See Also